@extends('layout.home')

@section('css')
<link rel="stylesheet" type="text/css" href="/homes/css/tag.css">
@endsection

@section('content')
<div class='tag_right'>
	<h2>标签云</h2>
	<div id='tag'>
		<a href="" class="tagc1">js特效代码</a>
		<a href="" class="tagc2">1312312</a>
		<a href="" class="tagc5">js特效代码</a>
		<a href="" class="tagc1">js特效代码</a>
		<a href="" class="tagc2">js特效代码</a>
		<a href="" class="tagc5">js特效代码</a>
		<a href="" class="tagc1">js特效代码</a>
		<a href="" class="tagc2">js特效代码</a>
		<a href="" class="tagc5">js特效代码</a>
		<a href="" class="tagc2">js特效代码</a>
		<a href="" class="tagc1">js特效代码</a>
	</div>
</div>

<!-- 标签云特效 -->
<script type="text/javascript">
	var radius = 90;
	var d = 200;
	var dtr = Math.PI / 180;
	var mcList = [];
	var lasta = 1;
	var lastb = 1;
	var distr = true;
	var tspeed = 11;
	var size = 200;
	var mouseX = 0;
	var mouseY = 10;
	var howElliptical = 1;
	var aA = null;
	var oDiv = null;
	window.onload=function ()
	{
		var i=0;
		var oTag=null;
		oDiv=document.getElementById('tag');
		aA=oDiv.getElementsByTagName('a');
		for(i=0;i<aA.length;i++)
		{
			oTag={};		
			aA[i].onmouseover = (function (obj) {
				return function () {
					obj.on = true;
					this.style.zIndex = 9999;
					this.style.color = '#fff';
					this.style.padding = '5px 5px';
					this.style.filter = "alpha(opacity=100)";
					this.style.opacity = 1;
				}
			})(oTag)
			aA[i].onmouseout = (function (obj) {
				return function () {
					obj.on = false;
					this.style.zIndex = obj.zIndex;
					this.style.color = '#fff';
					this.style.padding = '5px';
					this.style.filter = "alpha(opacity=" + 100 * obj.alpha + ")";
					this.style.opacity = obj.alpha;
					this.style.zIndex = obj.zIndex;
				}
			})(oTag)
			oTag.offsetWidth = aA[i].offsetWidth;
			oTag.offsetHeight = aA[i].offsetHeight;
			mcList.push(oTag);
		}
		sineCosine( 0,0,0 );
		positionAll();
		(function () {
	            update();
	            setTimeout(arguments.callee, 40);
	        })();
	};
	function update()
	{
		var a, b, c = 0;
	        a = (Math.min(Math.max(-mouseY, -size), size) / radius) * tspeed;
	        b = (-Math.min(Math.max(-mouseX, -size), size) / radius) * tspeed;
	        lasta = a;
	        lastb = b;
	        if (Math.abs(a) <= 0.01 && Math.abs(b) <= 0.01) {
	            return;
	        }
	        sineCosine(a, b, c);
	        for (var i = 0; i < mcList.length; i++) {
	            if (mcList[i].on) {
	                continue;
	            }
	            var rx1 = mcList[i].cx;
	            var ry1 = mcList[i].cy * ca + mcList[i].cz * (-sa);
	            var rz1 = mcList[i].cy * sa + mcList[i].cz * ca;

	            var rx2 = rx1 * cb + rz1 * sb;
	            var ry2 = ry1;
	            var rz2 = rx1 * (-sb) + rz1 * cb;

	            var rx3 = rx2 * cc + ry2 * (-sc);
	            var ry3 = rx2 * sc + ry2 * cc;
	            var rz3 = rz2;

	            mcList[i].cx = rx3;
	            mcList[i].cy = ry3;
	            mcList[i].cz = rz3;

	            per = d / (d + rz3);

	            mcList[i].x = (howElliptical * rx3 * per) - (howElliptical * 2);
	            mcList[i].y = ry3 * per;
	            mcList[i].scale = per;
	            var alpha = per;
	            alpha = (alpha - 0.6) * (10 / 6);
	            mcList[i].alpha = alpha * alpha * alpha - 0.2;
	            mcList[i].zIndex = Math.ceil(100 - Math.floor(mcList[i].cz));
	        }
	        doPosition();
	}
	function positionAll()
	{
		var phi = 0;
	    var theta = 0;
	    var max = mcList.length;
	    for (var i = 0; i < max; i++) {
	        if (distr) {
	            phi = Math.acos(-1 + (2 * (i + 1) - 1) / max);
	            theta = Math.sqrt(max * Math.PI) * phi;
	        } else {
	            phi = Math.random() * (Math.PI);
	            theta = Math.random() * (2 * Math.PI);
	        }
	        //坐标变换
	        mcList[i].cx = radius * Math.cos(theta) * Math.sin(phi);
	        mcList[i].cy = radius * Math.sin(theta) * Math.sin(phi);
	        mcList[i].cz = radius * Math.cos(phi);

	        aA[i].style.left = mcList[i].cx + oDiv.offsetWidth / 2 - mcList[i].offsetWidth / 2 + 'px';
	        aA[i].style.top = mcList[i].cy + oDiv.offsetHeight / 2 - mcList[i].offsetHeight / 2 + 'px';
	    }
	}
	function doPosition()
	{
		var l = oDiv.offsetWidth / 2;
	        var t = oDiv.offsetHeight / 2;
	        for (var i = 0; i < mcList.length; i++) {
	            if (mcList[i].on) {
	                continue;
	            }
	            var aAs = aA[i].style;
	            if (mcList[i].alpha > 0.1) {
	                if (aAs.display != '')
	                    aAs.display = '';
	            } else {
	                if (aAs.display != 'none')
	                    aAs.display = 'none';
	                continue;
	            }
	            aAs.left = mcList[i].cx + l - mcList[i].offsetWidth / 2 + 'px';
	            aAs.top = mcList[i].cy + t - mcList[i].offsetHeight / 2 + 'px';
	            //aAs.fontSize=Math.ceil(12*mcList[i].scale/2)+8+'px';
	            //aAs.filter="progid:DXImageTransform.Microsoft.Alpha(opacity="+100*mcList[i].alpha+")";
	            aAs.filter = "alpha(opacity=" + 100 * mcList[i].alpha + ")";
	            aAs.zIndex = mcList[i].zIndex;
	            aAs.opacity = mcList[i].alpha;
	        }
	}
	function sineCosine( a, b, c)
	{
		sa = Math.sin(a * dtr);
	    ca = Math.cos(a * dtr);
	    sb = Math.sin(b * dtr);
	    cb = Math.cos(b * dtr);
		sc = Math.sin(c * dtr);
		cc = Math.cos(c * dtr);
	}
</script>
@endsection

